Sludge Demetalization by the Union Carbide Corporation Electrochemical Process

摘要

Laboratory-scale apparatus was designed and constructed to evaluate an electrochemical sludge demetalization process developed by Union Carbide to determine the desirable electrode and cell configurations which would remove the metals such as cadmium, nickel and zinc from municipal wastewater sludge. The quantity and quality of data obtained showed that the process was feasible but that additional work was necessary to make the process a production process. Economics which were established based on the small amount of data obtained, indicated that the cadmium could be substantially removed at a piece of about 100 dollars per dry ton of sludge, which is not considered economically attractive at this time.